• 한국수학교육학회지시리즈E:수학교육논문집
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• 제36권2호
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• pp.201-227
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• 2022

한국 고등학교 학생들에게 적합한 수학불안 요인 측정도구를 개발하기 위하여 요인 탐색, 문항 개발, 타당도 및 신뢰도 검증의 단계로 연구를 실시하였다. 이를 위하여 문헌분석을 통해 기 개발되어 사용되어온 문항을 수정 보완하고, 학생들을 대상으로 한 개방형 조사를 통해 사교육 및 수학 교수 방법에 대한 시대적 배경을 반영한 신규 문항을 추가하였다. 개발된 측정문항에 대한 탐색적 요인분석과 확인적 요인분석을 통해 타당도를 검증하였으며, 연구 결과, 수학교과의 특성에 기인하는 불안 요인이 구체화되었고, 모둠학습이나 발표수업 등과 같은 교수학습 방법 등이 반영되었다.

• Korean Journal of Radiology
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• 제22권7호
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• pp.1034-1043
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• 2021

Objective: The purpose of this meta-analysis was to investigate the pooled agreements of the coronary artery calcium (CAC) severities assessed by electrocardiogram (ECG)-gated and non-ECG-gated CT and evaluate the impact of the scan parameters. Materials and Methods: PubMed, EMBASE, and the Cochrane library were systematically searched. A modified Quality Assessment of Diagnostic Accuracy Studies-2 tool was used to evaluate the quality of the studies. Meta-analytic methods were utilized to determine the pooled weighted bias, limits of agreement (LOA), and the correlation coefficient of the CAC scores or the weighted kappa for the categorization of the CAC severities detected by the two modalities. The heterogeneity among the studies was also assessed. Subgroup analyses were performed based on factors that could affect the measurement of the CAC score and severity: slice thickness, reconstruction kernel, and radiation dose for non-ECG-gated CT. Results: A total of 4000 patients from 16 studies were included. The pooled bias was 62.60, 95% LOA were -36.19 to 161.40, and the pooled correlation coefficient was 0.94 (95% confidence interval [CI] = 0.89-0.97) for the CAC score. The pooled weighted kappa of the CAC severity was 0.85 (95% CI = 0.79-0.91). Heterogeneity was observed in the studies (I² > 50%, p < 0.1). In the subgroup analysis, the agreement between the CAC categorizations was better when the two CT examinations had reconstructions based on the same slice thickness and kernel. Conclusion: The pooled agreement of the CAC severities assessed by the ECG-gated and non-ECG-gated CT was excellent; however, it was significantly affected by scan parameters, such as slice thickness and the reconstruction kernel.

• Journal of Yeungnam Medical Science
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• 제13권1호
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• pp.110-115
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• 1996

적혈구 침강속도는 전통적인 검사의 하나로서 진단에 있어서는 다소 비특이적인 검사이지만 몇몇 질병의 activity를 평가하고 추적검사에 유용한 것으로 평가되고 있다. Westergren법이 표준화된 검사법으로 인정받고 있으나 보고자에 따라 CV값이 0.8-22.9%로 보고되고 있다. 저자들은 143명의 검체를 대상으로 ESR 자동화 기기인$SEDIsystem^{TM}$ 사용하여 ESR을 측정하고 modified Westergren법, Wintrobe법과 비교하여 임상에 적용될 수 있는지를 검토하였다. $SEDIsystem^{TM}$로 측정한 ESR 결과와 modified Westergren법으로 측정한 ESR 결과사이의 상관식 및 상관계수(r)는 y = 0.863x - 1.69 (r=0.830)이었고, $SEDIsystem^{TM}$로 측정한 ESR 결과와 Wintrobe법으로 측정한 ESR 결과사이의 상관식 및 상관계수(r)는 y = 1. 14x - 14.7 (r=0.789)이었고, 검체의 안정성을 평가하기 위해 시간에 따른 ESR의 반복 측정치는 통계적으로 유의한 차이는 없었다. 위의 결과로 볼 때 $SEDIsystem^{TM}$을 이용한 검사는 기존의 modified Westergren, Wintrobe법들과의 상관성이 높았고 4시간까지 안정된 결과를 보였으며 또한 대량의 검체를 신속하게 보고할 수 있어서 임상 혈액검사실에서 이용하기에 적합하다고 생각된다.

• 대한간호학회지
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• 제36권7호
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• pp.1154-1163
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• 2006

Purpose: This study was to monitor the effects of forming desirable eating and exercise habits and change the blood lipid levels by developing and applying E-Mail educational programs for a hyperlipidemia health check-up. Method: The research design used a nonequivalent control group pre-post test. Ninety-nine subjects (Exp.=50, Cont.=49) were selected randomly and the male subjects agreed to a hyperlipidemia health check-up at a comprehensive medical screening center. This study verified validity and reliability through factor analysis on a life habit measurement tool. The data was analyzed with SPSS win 12.0 using an $X^2-test$, t-test, ANOVA and ANCOVA. Result: Eatingand exercise habit scores of the experimental group which were educated through E-Mails changed considerably more than that of the control group which was not educated. Total-cholesterol and LDL-cholesterol in the experimental group was considerably lower than that in the control group, but HDL-cholesterol increased considerably Triglycerides, however, didn't show change. Conclusion: An E-Mail educational program may be applied as a hyperlipldemia health check-up nursing intervention strategy.

• 보건교육건강증진학회지
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• 제29권1호
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• pp.73-87
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• 2012

Objectives: The purpose of this study was to examine the compositional fitness and independence of the original six dimensions and the newly-designed six dimensions of Integrated Questionnaire for the Measurement of Social Capital[SC-IQ], and to explore the more simplified version for convenient use in public health-related social capital studies. Methods: This study reanalyzed social capital items included in a 2004 community health survey of K-city conducted by Hallym Health Services Research Center. Data was collected from 1,000 adults using core questions of SC-IQ. Explanatory factor analyses to all questions were done, and the new six dimensions were established. Confirmatory factor analyses[CFA] were done on the original and new six dimensions. And then reliability and validity test were done. SPSS 15.0 and AMOS 7.0 were used. Results: The final CFA module to the new SC-IQ exhibited Root Mean Square Error of Approximation[RMSEA] 0.028 and only compositional fitness and independence, and was composed of four dimensions and eight questions, and covers all elements of social capital including structural, cognitive, operational, outcome, bonding and bridging elements. Conclusion: This study demonstrates the utility of a new, simplified version of SC-IQ as well as its convenience.

• 대한가정학회지
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• 제47권2호
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• pp.69-79
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• 2009

This study was conducted to develop a scale to evaluate maternal beliefs regarding employment and to demonstrate its validity. The subjects in the study included 225 mothers in Suncheon who had children under the age of 5. Initially, the definitions of beliefs associated with employment presented in previous studies were examined, after which the existing scale, Beliefs about the Consequence Maternal Employment for Young Children (BACMEC), was modified based the advice of three experts in child study. Next, 35 mothers who had preschool children were interviewed to assess their views on the positive and negative aspects of maternal employment. After excluding overlapping contents, a scale composed of 50 questions (24questions adapted from questions on the BACMEC and 26 created based on the results of the interview) was generated. Based on the result of factor and regression analysis, 27 (15questions regarding positive aspects of employment and 12 regarding negative aspects of employment) of the 50 questions were selected for use as the new scale. Reliability analysis showed satisfactory results (Cronbach's $\alpha$ = .89-.92). In conclusion, it is hoped that the scale for maternal beliefs in employment developed in this study will be used as a useful measurement tool in future studies conducted to evaluate maternal employment.

• 보건의료산업학회지
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• 제9권2호
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• pp.1-12
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• 2015

The objective of this study was to verify the effects of brand equity of small & medium hospitals on trust and relationship commitment and mediation effect of trust in the relation between brand equity and relationship commitment. For testing reliability and validity of the measurement tool, Cronbach's ${\alpha}$ and confirmatory factor analysis was used, respectively. A structural equation model was applied for verifying the study model suggested. Out of 450 questionnaires distributed, 439 was returned. On the study results, brand image and perceived quality positively determined trust of customers for small & medium hospitals. Customers' trust also has a positive effect on relationship commitment. Brand awareness positively influence the levels of relationship commitment. Moreover, a mediation effect was identified. Customers' trust mediated the effects of brand image and perceived quality on relationship commitment of hospitals customers. On conclusions, relationship commitment was determined, either directly or indirectly, by brand image and perceived quality, while trust mediated the their relationship. Thus, hospitals management may use the concepts of brand equity and trust as a key success factor of their business purposes.

• 대한간호학회지
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• 제43권2호
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• pp.256-266
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• 2013

Purpose: The purpose of this study was to develop a measurement tool of nurse's turnover intention. Methods: Data were collected from questionnaires completed by 678 nurses who worked in 3 university hospitals in South Korea and analyzed using the SPSS 18.0 and AMOS 18 programs. Thirty-seven preliminary items were selected from 161 basic items extracted via a literature review and in depth interviews with 6 hospital nurses. Three steps with factor analysis were undertaken to verify the reliability and validity of the preliminary instruments. Finally, confirmative factor analysis was carried out. Results: As a result of the analysis, 3 factors including 10 items were selected. Cronbach's Alpha for the 10 items was .83, for job satisfaction (4 items), .78, for interpersonal relationships (3 items), .80, and for work performance (3 items), .74, which was stable. Conclusion: This study is meaningful because through it a scale reflecting Korean culture was developed to measure turnover intention in nurses. Further studies that test the psychometrics of this scale in more diverse samples are warranted.

• 융합신호처리학회논문지
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• 제14권1호
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• pp.1-5
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• 2013

The two major problems related to the blood flow in replaced prosthetic heart valve are thrombus formation and hemolysis. Reliability of prosthetic valve is very important because its failure means the death of patient. There are many factors affecting the valvular failures and their representatives are mechanical failure and thrombosis, so early noninvasive detection is essentially required. The purpose of this study is to detect the various thromboses formation by using acoustic signal acquisition and its spectral analysis on the frequency domain. We made the thrombosis models using Polydimethylsiloxane (PDMS) and they are thrombosis model on the disc, around the sewing ring and fibrous tissue growth across the orifice of valve. Using microphone and amplifier, we measured the acoustic signal from the prosthetic valve, which is attached to the pulsatile mock circulation system. A/D converter sampled the acoustic signal and the spectral analysis is the main algorithm for obtaining spectrum. Then the spectrum of normal and 5 different kinds of abnormal valve were obtained. Each spectrum waveform shows a primary and secondary peak. The secondary peak changes according to the thrombus model. To quantitatively distinguish the frequency peak of the normal valve from that of the thrombosed valves, analysis using a neural network was employed. Acoustic measurement has been used as a noninvasive diagnostic tool and is thought to be a good method for detecting possible mechanical failure or thrombus.

• 재활간호학회지
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• 제17권1호
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• pp.10-17
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• 2014

Purpose: The Leeds Sleep Evaluation Questionnaire (LSEQ) translated into Korean was modified to easily apply and reduce respondents' confusion and was evaluated for psychometric properties and discriminant ability. Methods: A total of 960 Korean adults aged 45 years and older participated in this cross-sectional survey. To test reliability, validity and discriminant ability, Cronbach's alpha, correlation analysis, confirmatory factor analysis, simple regression analysis and receiver operating characteristics (ROC) curve analysis were used. Results: Item-total correlations ranged between 62~.85 and Cronbach's alpha was .95. Area under ROC was .86 (95% CI: .83~.90) and the optimal cutoff score was identified as ${\leq}$ 66 (sensitivity, .77; specificity, .84; positive/negative predictive values, .49/.95). Using this cutoff score, the prevalence of insomnia in the study sample was 25.8% and tended to be more common in female and older groups. Conclusion: The data supported the psychometric properties of Korean Modified Leeds Sleep Evaluation Questionnaire (KMLSEQ) as an acceptable sleep measurement. In addition, KMLSEQ is likely to be a useful screening tool for insomnia.